RRD Cleaner not function

[areast]

Dear All

Just install RRD plugin with 0.8.8c package with window2008R2 64bit

I am able to scan with rrd clean, however it does not do any action with "chosen ac action"
Tried all action "Delete / backup / achieve"

Under setting -> Misc also set the backup and achieve path already.
So not sure any setup that missing. Beside rrdclean is version 0.41